Welcome and to answer your questions directly:
1) There are 13 year olds using AM quite successfully. So I've no doubt you'll get the hang of it. Though it may not be quick, stick at it.
2) Yes...and texture, animate and render them.
3) As long as you have patience, time and talent to put into a movie, AM can handle it.
4) If you do the exercises in the manual, it'll speed up your progress. Generally, it takes two months (give or take 6 months) to get something half decent on your own.